feat: added static linking against libnl

libnl will be used to help understand kernel routing tables

.devcontainer/Dockerfile

@@ -15,7 +15,7 @@
 
 FROM rust:1-alpine
 
-RUN apk add bash docker git cmake make automake musl-dev \
+RUN apk add bash docker git cmake make automake musl-dev autoconf libtool \
         flex bison linux-headers openssl-dev apache2-utils docker-compose && \
     mkdir /etc/docker && \
     echo '{ "storage-driver": "vfs" }' > /etc/docker/daemon.json

.gitmodules

@@ -1,3 +1,6 @@
 [submodule "pcap-sys/libpcap"]
 	path = pcap-sys/libpcap
 	url = https://github.com/the-tcpdump-group/libpcap
+[submodule "nl-sys/libnl"]
+	path = nl-sys/libnl
+	url = https://github.com/thom311/libnl

Cargo.lock

@@ -25,6 +25,15 @@ version = "1.1.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "d468802bab17cbc0cc575e9b053f41e72aa36bfa6b7f55e3529ffa43161b97fa"
 
+[[package]]
+name = "autotools"
+version = "0.2.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "aef8da1805e028a172334c3b680f93e71126f2327622faef2ec3d893c0a4ad77"
+dependencies = [
+ "cc",
+]
+
 [[package]]
 name = "beacon"
 version = "0.1.0"
@@ -363,6 +372,7 @@ dependencies = [
 name = "nl-sys"
 version = "0.1.0"
 dependencies = [
+ "autotools",
  "libc",
 ]
 

Cargo.toml

@@ -1,5 +1,5 @@
 [workspace]
-members = ["pcap-sys", "examples/bind-shell/*", "examples/reverse-shell/*", "nl-sys"]
+members = ["pcap-sys", "nl-sys", "examples/*/*"]
 
 [profile.release]
 strip = true

nl-sys/Cargo.toml

@@ -7,3 +7,6 @@ edition = "2021"
 
 [dependencies]
 libc = "0.2.142"
+
+[build-dependencies]
+autotools = "0.2"

nl-sys/build.rs

@@ -0,0 +1,24 @@
+// Copyright (C) 2023 Andrew Rioux
+// 
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Affero General Public License as
+// published by the Free Software Foundation, either version 3 of the
+// License, or (at your option) any later version.
+// 
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU Affero General Public License for more details.
+// 
+// You should have received a copy of the GNU Affero General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+fn main() {
+    let dst = autotools::Config::new("libnl")
+        .reconf("-vi")
+        .build();
+
+    println!("cargo:rustc-link-search=native={}/lib", dst.display());
+    println!("cargo:rustc-link-lib=static=nl-3");
+    println!("cargo:rustc-link-lib=static=nl-route-3");
+}

nl-sys/libnl

@@ -0,0 +1 @@
+Subproject commit cbafad9ddf24caef5230fef715d34f0539603be0

nl-sys/src/lib.rs

@@ -1,14 +0,0 @@
-pub fn add(left: usize, right: usize) -> usize {
-    left + right
-}
-
-#[cfg(test)]
-mod tests {
-    use super::*;
-
-    #[test]
-    fn it_works() {
-        let result = add(2, 2);
-        assert_eq!(result, 4);
-    }
-}

nl-sys/src/main.rs

@@ -0,0 +1,24 @@
+// Copyright (C) 2023 Andrew Rioux
+// 
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Affero General Public License as
+// published by the Free Software Foundation, either version 3 of the
+// License, or (at your option) any later version.
+// 
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU Affero General Public License for more details.
+// 
+// You should have received a copy of the GNU Affero General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+enum nl_sock {}
+
+extern {
+    fn nl_socket_alloc() -> nl_sock;
+}
+
+fn main() {
+    unsafe { nl_socket_alloc(); }
+}